It feels pretty terrible when it feels like you have to literally beg people to let you help them. So, if you’re ready to just move on, by all means. But, by any chance, did you post to Requests on BBOARD saying that you are interested in volunteering and that you sent an application by email but never got a response? It might be worth a try if you still have some action points to spare.
I just want to say, in any case, thanks for trying. This random stranger really appreciates it.